Mineral

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Hardness: 7 Mohs; Color: Muted green with shimmering specks; Luster: Vitreous to waxy with aventurescence; Crystal structure: Trigonal/Hexagonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.63 - 2.65

Hardness: 7 Mohs
Color: Muted green with shimmering specks
Luster: Vitreous to waxy with aventurescence

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in metamorphic environments where silica-rich fluids permeate through rocks containing mica or other platy minerals. The green color is derived from inclusions of chromium-bearing mica (fuchsite). Most deposits range from 10 million to 1.5 billion years old depending on the source.

Uses & applications

Predominantly used for ornamental purposes, lapidary work (producing beads, cabochons, and carvings), and in the metaphysical/gemstone market as a 'stone of prosperity'.

Geological facts

The name comes from the Italian 'a ventura', meaning 'by chance', originally referring to accidental discoveries of aventurine glass. The shimmering effect is known as 'aventurescence', caused by light reflecting off tiny mineral platelets inside the stone.

Field identification & locations

Identify in the field by its waxy luster and the presence of 'spangles' or tiny internal sparkles when rotated under a light source. Commonly found in India, Brazil, and Russia. Collectors should look for even color saturation and a high density of mica inclusions.

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